JPS6148471U

JPS6148471U -

Info

Publication number: JPS6148471U
Application number: JP13432484U
Authority: JP
Priority date: 1984-09-04
Filing date: 1984-09-04
Publication date: 1986-04-01

Description

[Brief explanation of the drawing]

第１図は本考案のモンターコアを備えた磁気デ
イスクカートリツジの概要を示す斜視図、第２図
はそのＡ−Ａ線拡大断面図、第３図はセンターコ
アとセンターコアチヤツキング部との吸着係合を
説明するための斜視図、第４図はモータスピンド
ルとモータスピンドル挿入用角孔との係合状態を
示す概略図である。１…磁気デイスクシート、２Ａ…上ハーフ、２
Ｂ…下ハーフ、３…センターコア、３ａ…フラン
ジ部、３ｂ…軸部、３ｃ…上端面、４…磁性層、
７…センターコアチヤツキング部。 Fig. 1 is a perspective view showing an outline of a magnetic disk cartridge equipped with a monter core of the present invention, Fig. 2 is an enlarged sectional view taken along the line A-A, and Fig. 3 shows a diagram of the center core and the center core chucking section. FIG. 4 is a perspective view for explaining the suction engagement, and a schematic view showing the state of engagement between the motor spindle and the square hole for inserting the motor spindle. 1... Magnetic disk sheet, 2A... Upper half, 2
B...lower half, 3...center core, 3a...flange part, 3b...shaft part, 3c...upper end surface, 4...magnetic layer,
7...Center core coaching club.

Claims

[Scope of utility model registration request]

A flange portion supporting the inner circumferential portion of a disk-shaped magnetic disk sheet housed in a case consisting of upper and lower halves, and a flange portion having an upper end surface exposed to an opening provided in the upper half and provided integrally with the flange portion. a cylindrical shaft with a bottom, and the upper end surface of the shaft is magnetically engaged with an external rotational drive member and driven to rotate, thereby integrally rotating the magnetic disk sheet. The center core for a cartridge is characterized in that the center core is made of a metal having a Vickers hardness of 260 or more, and a magnetic layer is provided on at least a portion of the upper end surface of the shaft portion that is attracted to the rotational drive member. Center core for magnetic disk cartridges.